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Impact of overgrazing on the transmission of Echinococcus multilocularis in Tibetan pastoral communities of Sichuan Province, China

WANG Qian XIAO Yong-fu Dominique A Vuitton Peter M Schantz Francis Raoul Christine Budke Maiza Campos-Ponce Philip S Craig Patrick Giraudoux

中华医学杂志（英文版）2007，Vol.120Issue(3)：237-242,6.

Impact of overgrazing on the transmission of Echinococcus multilocularis in Tibetan pastoral communities of Sichuan Province, China

WANG Qian ¹XIAO Yong-fu ¹Dominique A Vuitton ²Peter M Schantz ³Francis Raoul ⁴Christine Budke ²Maiza Campos-Ponce ³Philip S Craig ⁵Patrick Giraudoux⁶

作者信息

1. Sichuan Centre for Disease Control and Prevention, Chengdu 610041, China
2. WHO Collaborating Centre for the Prevention and Treatment of Alveolar Echinococcosis
3. SERF and LBE Usc INRA Research Units, University of Franche-Comte, 25030-Besancon, France
4. Division of Parasitic Diseases, Centres for Disease Control and Prevention, Atlanta, GA 30333, USA
5. Institute of Parasitology, University of Zurich, Winterthurerstrasse 266a, CH-8057, Zurich, Switzerland
6. Faculty of Earth and Life Sciences, Free University, Amsterdam,Netherlands
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摘要

Abstract

Background Overgrazing was assumed to increase the population density of small mammals that are the intermediate hosts of Echinococcus multilocularis, the pathogen of alveolar echinococcosis in the Qinghai Tibet Plateau. This research tested the hypothesis that overgrazing might promote Echinococcus multilocularis transmission through increasing populations of small mammal, intermediate hosts in Tibetan pastoral communities.Methods Grazing practices, small mammal indices and dog Echinococcus rnultilocularis infection data were collected to analyze the relation between overgrazing and Echinococcus rnultilocularis transmission using nonpararnetric tests and multiple stepwise logistic regression.Results In the investigated area, raising livestock was a key industry. The communal pastures existed and the available forage was deficient for grazing. Open (common) pastures were overgrazed and had higher burrow density of small mammals compared with neighboring fenced (private) pastures; this high overgrazing pressure on the open pastures measured by neighboring fenced area led to higher burrow density of small mammals in open pastures. The median burrow density of small mammals in open pastures was independently associated with nearby canine Echinococcus multilocularis infection (P=0.003, OR=1.048).Conclusion Overgrazing may promote the transmission of Echinococcus multilocularis through increasing the population density of small mammals.

关键词

echinococcosis, hepatic/Echinococcus multilocularis/overgrazing/Tibetan pastoral communities

Key words

echinococcosis, hepatic/Echinococcus multilocularis/overgrazing/Tibetan pastoral communities

引用本文复制引用

WANG Qian,XIAO Yong-fu,Dominique A Vuitton,Peter M Schantz,Francis Raoul,Christine Budke,Maiza Campos-Ponce,Philip S Craig,Patrick Giraudoux..Impact of overgrazing on the transmission of Echinococcus multilocularis in Tibetan pastoral communities of Sichuan Province, China[J].中华医学杂志（英文版）,2007,120(3):237-242,6.

基金项目

This study was supported by the grants from the Health Department of Sichuan Province, the Ecology of Infectious Diseases Program from USA National Institutes of Health (No.1565), and the French Embassy in Beijing. （No.1565）

中华医学杂志（英文版）

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